I am in the process of connecting my Standard Horizon AIS to my laptop running OpenCPN. I have looked for some sort of diagram showing which pins to solder my NMEA signal-out wires to the serialplug, but have't been able to find one that works. Does anyone have a 9 pin diagram showing which pins OpenCPN is looking for when I tell it to use the serial port for incoming AIS data?

Caution: "serial" covers a lot of territory. The NMEA 0183 standard uses RS-422 interfaces, while most computer equipment uses RS-232 interfaces. These days most RS-232 interfaces can successfully interconnect to RS-422, but there are still many that do not. Your best bet is to buy a USB RS-422 adapter.

I have a USB RS-232 adapter...not a USB RS-422 adapter and being in Mexico I doubt I'll get one anytime soon.

Thanks for the link to the diagram. I did Google 9 pin Serial diagram and came up with many different 'standards'... I guess I was hoping someone who helped create the software would know what OpenCPN was looking for.